Ac/dc converting circuit

Details Ac/dc converting circuit Ac/dc converting circuit

1997-06-04

1999-11-02

Nguyen, Matthew

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 84, H02M 542

Patent

active

059782439

ABSTRACT:
An ac/dc converting circuit adapted to output a direct voltage that is higher than a full wave rectified voltage of an alternating input voltage is provided which includes an alternating current filter, and a condenser with a positive electrode and a negative electrode coupled to a dc output side of a full wave rectifying circuit. The full wave rectifying circuit includes a switching portion having upper and lower arms each having a semiconductor rectifying element and a self-commutated semiconductor switching element, and a rectifying portion having upper and lower arms each having a semiconductor rectifying element. The semiconductor rectifying elements in the upper arms of the full wave rectifying circuit has a common cathode coupled to the positive electrode, and the semiconductor rectifying elements in the lower arms has a common anode coupled to the negative electrode. The ac/dc converting circuit further includes a resistor provided between a coupling point of the rectifying elements of the upper arms of the fill wave rectifying circuit and the negative electrode. In operation, a signal for controlling an ON/OFF state of the switching element of the lower arm of the switching portion is generated while the switching element of its upper arm is in an OFF state, when the direct output voltage is higher than the input alternating voltage, and a voltage at an ac input terminal between the rectifying elements of the switching portion is lower than a voltage at an ac input terminal between the rectifying elements of the rectifying portion.

REFERENCES:
patent: 4193111 (1980-03-01), Wester
patent: 5654882 (1997-08-01), Kanazawa et al.
patent: 5687065 (1997-11-01), Majid
patent: 5751567 (1998-05-01), Toyozaki et al.

Affiliated with

Also associated with

Rating

Ac/dc converting circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ac/dc converting circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ac/dc converting circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2144255